in_array VS strpos在PHP中的表现 [英] in_array vs strpos for performance in php

问题描述

我在用户通过Windows身份验证登录，然后存储在一个会话变量，用户的权限。我使用的权利存储分隔的方法在一个数据库即：

I am logging in users via windows authentication and then storing that user's rights in a session variable. I use a delimited method of rights storage in a database i.e:

$rights //retrieved from database 
= 'read,edit,delete,admin'

所以我的问题是我应该;

so my question is should I;

//generate variable
$_SESSION['userrights'] = $rights ($rights is retrieved from database)

//use strpos to find if right is allowed
if (strpos($_SESSION['userrights'],"admin") !== false) { // do the function }

或

//make array of rights
$_SESSION['userrights'] = explode(',',$rights)

//use in_array to find if right is allowed
if (in_array("admin",$_SESSION['userrights'])) { // do the function }

我presume的差异将是pretty我在做什么太多可以忽略不计，但是这将是更快（使用更少的资源）方法的OCD问题位？

Bit of a OCD question as I presume the difference will be pretty much negligible for what I am doing but which would be the faster (use less resources) method?

任何答案AP preciated除了那些侮辱我的权利存储方法！

Any answers appreciated except ones that insult my method of rights storage!

推荐答案

strpos是搜索文本针的最快方法，php.net网站：

strpos is the fastest way to search a text needle, php.net site:

If you only want to determine if a particular needle occurs within haystack, use the     faster and less memory intensive function strpos()....

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